Mac Catalyst target does not build on M1 with this error: Could not read serialized diagnostics file: error("Invalid diagnostics signature")

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Created Jan ’22

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I have a project with a Mac Catalyst target that I can not build on my m1 mac (it works fine on my older intel mac). This is the error message: Could not read serialized diagnostics file: error("Invalid diagnostics signature") (in target 'LifeViewerMac' from project 'NoRegrets') Command CompileSwift failed with a nonzero exit code

Here's the xcode screenshot:

Screenshot 2022-01-14 at 02.35.51.png

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Answer 1

OOPer OP

Jan ’22

As far as I experience till now, the error Could not read serialized diagnostics file is temporary.

Please try Clean Build Folder, re-starting Xcode or re-starting your Mac and take sometime to see what happens next.

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Answer 2

Stiivi OP

Feb ’22

Having the same problem with XCode Version 13.2.1 (13C100), regular application project on 2016 MBP (the problem seems not to be Catalyst nor M1 related). Tried:

clean build folder
restart computer
reinstall XCode

Neither helped.

Only thing I noticed that all the *.dia files in the build folder have zero length. So whichever tool produces them must be crashing unexpectedly.

EDIT: Noticed that it crashes only when an error is inside of a function. If an error is at the top-level structure (class, function signature, ...), then it is being reported as expected.

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